/**
 * Copyright (c) 2006-2015, JGraph Ltd
 * Copyright (c) 2006-2015, Gaudenz Alder
 */
/**
 * Class: mxToolbar
 *
 * Creates a toolbar inside a given DOM node. The toolbar may contain icons,
 * buttons and combo boxes.
 *
 * Event: mxEvent.SELECT
 *
 * Fires when an item was selected in the toolbar. The <code>function</code>
 * property contains the function that was selected in <selectMode>.
 *
 * Constructor: mxToolbar
 *
 * Constructs a toolbar in the specified container.
 *
 * Parameters:
 *
 * container - DOM node that contains the toolbar.
 */
function mxToolbar(container)
{
    this.container = container;
};

/**
 * Extends mxEventSource.
 */
mxToolbar.prototype = new mxEventSource();
mxToolbar.prototype.constructor = mxToolbar;

/**
 * Variable: container
 *
 * Reference to the DOM nodes that contains the toolbar.
 */
mxToolbar.prototype.container = null;

/**
 * Variable: enabled
 *
 * Specifies if events are handled. Default is true.
 */
mxToolbar.prototype.enabled = true;

/**
 * Variable: noReset
 *
 * Specifies if <resetMode> requires a forced flag of true for resetting
 * the current mode in the toolbar. Default is false. This is set to true
 * if the toolbar item is double clicked to avoid a reset after a single
 * use of the item.
 */
mxToolbar.prototype.noReset = false;

/**
 * Variable: updateDefaultMode
 *
 * Boolean indicating if the default mode should be the last selected
 * switch mode or the first inserted switch mode. Default is true, that
 * is the last selected switch mode is the default mode. The default mode
 * is the mode to be selected after a reset of the toolbar. If this is
 * false, then the default mode is the first inserted mode item regardless
 * of what was last selected. Otherwise, the selected item after a reset is
 * the previously selected item.
 */
mxToolbar.prototype.updateDefaultMode = true;

/**
 * Function: addItem
 *
 * Adds the given function as an image with the specified title and icon
 * and returns the new image node.
 *
 * Parameters:
 *
 * title - Optional string that is used as the tooltip.
 * icon - Optional URL of the image to be used. If no URL is given, then a
 * button is created.
 * funct - Function to execute on a mouse click.
 * pressedIcon - Optional URL of the pressed image. Default is a gray
 * background.
 * style - Optional style classname. Default is mxToolbarItem.
 * factoryMethod - Optional factory method for popup menu, eg.
 * function(menu, evt, cell) { menu.addItem('Hello, World!'); }
 */
mxToolbar.prototype.addItem = function(title, icon, funct, pressedIcon, style, factoryMethod)
{
    var img = document.createElement((icon != null) ? 'img' : 'button');
    var initialClassName = style || ((factoryMethod != null) ?
        'mxToolbarMode' : 'mxToolbarItem');
    img.className = initialClassName;
    img.setAttribute('src', icon);

    if (title != null)
    {
        if (icon != null)
        {
            img.setAttribute('title', title);
        }
        else
        {
            mxUtils.write(img, title);
        }
    }

    this.container.appendChild(img);

    // Invokes the function on a click on the toolbar item
    if (funct != null)
    {
        mxEvent.addListener(img, 'click', funct);

        if (mxClient.IS_TOUCH)
        {
            mxEvent.addListener(img, 'touchend', funct);
        }
    }

    var mouseHandler = mxUtils.bind(this, function(evt)
    {
        if (pressedIcon != null)
        {
            img.setAttribute('src', icon);
        }
        else
        {
            img.style.backgroundColor = '';
        }
    });

    // Highlights the toolbar item with a gray background
    // while it is being clicked with the mouse
    mxEvent.addGestureListeners(img, mxUtils.bind(this, function(evt)
    {
        if (pressedIcon != null)
        {
            img.setAttribute('src', pressedIcon);
        }
        else
        {
            img.style.backgroundColor = 'gray';
        }

        // Popup Menu
        if (factoryMethod != null)
        {
            if (this.menu == null)
            {
                this.menu = new mxPopupMenu();
                this.menu.init();
            }

            var last = this.currentImg;

            if (this.menu.isMenuShowing())
            {
                this.menu.hideMenu();
            }

            if (last != img)
            {
                // Redirects factory method to local factory method
                this.currentImg = img;
                this.menu.factoryMethod = factoryMethod;

                var point = new mxPoint(
                    img.offsetLeft,
                    img.offsetTop + img.offsetHeight);
                this.menu.popup(point.x, point.y, null, evt);

                // Sets and overrides to restore classname
                if (this.menu.isMenuShowing())
                {
                    img.className = initialClassName + 'Selected';

                    this.menu.hideMenu = function()
                    {
                        mxPopupMenu.prototype.hideMenu.apply(this);
                        img.className = initialClassName;
                        this.currentImg = null;
                    };
                }
            }
        }
    }), null, mouseHandler);

    mxEvent.addListener(img, 'mouseout', mouseHandler);

    return img;
};

/**
 * Function: addCombo
 *
 * Adds and returns a new SELECT element using the given style. The element
 * is placed inside a DIV with the mxToolbarComboContainer style classname.
 *
 * Parameters:
 *
 * style - Optional style classname. Default is mxToolbarCombo.
 */
mxToolbar.prototype.addCombo = function(style)
{
    var div = document.createElement('div');
    div.style.display = 'inline';
    div.className = 'mxToolbarComboContainer';

    var select = document.createElement('select');
    select.className = style || 'mxToolbarCombo';
    div.appendChild(select);

    this.container.appendChild(div);

    return select;
};

/**
 * Function: addCombo
 *
 * Adds and returns a new SELECT element using the given title as the
 * default element. The selection is reset to this element after each
 * change.
 *
 * Parameters:
 *
 * title - String that specifies the title of the default element.
 * style - Optional style classname. Default is mxToolbarCombo.
 */
mxToolbar.prototype.addActionCombo = function(title, style)
{
    var select = document.createElement('select');
    select.className = style || 'mxToolbarCombo';
    this.addOption(select, title, null);

    mxEvent.addListener(select, 'change', function(evt)
    {
        var value = select.options[select.selectedIndex];
        select.selectedIndex = 0;

        if (value.funct != null)
        {
            value.funct(evt);
        }
    });

    this.container.appendChild(select);

    return select;
};

/**
 * Function: addOption
 *
 * Adds and returns a new OPTION element inside the given SELECT element.
 * If the given value is a function then it is stored in the option's funct
 * field.
 *
 * Parameters:
 *
 * combo - SELECT element that will contain the new entry.
 * title - String that specifies the title of the option.
 * value - Specifies the value associated with this option.
 */
mxToolbar.prototype.addOption = function(combo, title, value)
{
    var option = document.createElement('option');
    mxUtils.writeln(option, title);

    if (typeof(value) == 'function')
    {
        option.funct = value;
    }
    else
    {
        option.setAttribute('value', value);
    }

    combo.appendChild(option);

    return option;
};

/**
 * Function: addSwitchMode
 *
 * Adds a new selectable item to the toolbar. Only one switch mode item may
 * be selected at a time. The currently selected item is the default item
 * after a reset of the toolbar.
 */
mxToolbar.prototype.addSwitchMode = function(title, icon, funct, pressedIcon, style)
{
    var img = document.createElement('img');
    img.initialClassName = style || 'mxToolbarMode';
    img.className = img.initialClassName;
    img.setAttribute('src', icon);
    img.altIcon = pressedIcon;

    if (title != null)
    {
        img.setAttribute('title', title);
    }

    mxEvent.addListener(img, 'click', mxUtils.bind(this, function(evt)
    {
        var tmp = this.selectedMode.altIcon;

        if (tmp != null)
        {
            this.selectedMode.altIcon = this.selectedMode.getAttribute('src');
            this.selectedMode.setAttribute('src', tmp);
        }
        else
        {
            this.selectedMode.className = this.selectedMode.initialClassName;
        }

        if (this.updateDefaultMode)
        {
            this.defaultMode = img;
        }

        this.selectedMode = img;

        var tmp = img.altIcon;

        if (tmp != null)
        {
            img.altIcon = img.getAttribute('src');
            img.setAttribute('src', tmp);
        }
        else
        {
            img.className = img.initialClassName+'Selected';
        }

        this.fireEvent(new mxEventObject(mxEvent.SELECT));
        funct();
    }));

    this.container.appendChild(img);

    if (this.defaultMode == null)
    {
        this.defaultMode = img;

        // Function should fire only once so
        // do not pass it with the select event
        this.selectMode(img);
        funct();
    }

    return img;
};

/**
 * Function: addMode
 *
 * Adds a new item to the toolbar. The selection is typically reset after
 * the item has been consumed, for example by adding a new vertex to the
 * graph. The reset is not carried out if the item is double clicked.
 *
 * The function argument uses the following signature: funct(evt, cell) where
 * evt is the native mouse event and cell is the cell under the mouse.
 */
mxToolbar.prototype.addMode = function(title, icon, funct, pressedIcon, style, toggle)
{
    toggle = (toggle != null) ? toggle : true;
    var img = document.createElement((icon != null) ? 'img' : 'button');

    img.initialClassName = style || 'mxToolbarMode';
    img.className = img.initialClassName;
    img.setAttribute('src', icon);
    img.altIcon = pressedIcon;

    if (title != null)
    {
        img.setAttribute('title', title);
    }

    if (this.enabled && toggle)
    {
        mxEvent.addListener(img, 'click', mxUtils.bind(this, function(evt)
        {
            this.selectMode(img, funct);
            this.noReset = false;
        }));

        mxEvent.addListener(img, 'dblclick', mxUtils.bind(this, function(evt)
        {
            this.selectMode(img, funct);
            this.noReset = true;
        }));

        if (this.defaultMode == null)
        {
            this.defaultMode = img;
            this.defaultFunction = funct;
            this.selectMode(img, funct);
        }
    }

    this.container.appendChild(img);

    return img;
};

/**
 * Function: selectMode
 *
 * Resets the state of the previously selected mode and displays the given
 * DOM node as selected. This function fires a select event with the given
 * function as a parameter.
 */
mxToolbar.prototype.selectMode = function(domNode, funct)
{
    if (this.selectedMode != domNode)
    {
        if (this.selectedMode != null)
        {
            var tmp = this.selectedMode.altIcon;

            if (tmp != null)
            {
                this.selectedMode.altIcon = this.selectedMode.getAttribute('src');
                this.selectedMode.setAttribute('src', tmp);
            }
            else
            {
                this.selectedMode.className = this.selectedMode.initialClassName;
            }
        }

        this.selectedMode = domNode;
        var tmp = this.selectedMode.altIcon;

        if (tmp != null)
        {
            this.selectedMode.altIcon = this.selectedMode.getAttribute('src');
            this.selectedMode.setAttribute('src', tmp);
        }
        else
        {
            this.selectedMode.className = this.selectedMode.initialClassName+'Selected';
        }

        this.fireEvent(new mxEventObject(mxEvent.SELECT, "function", funct));
    }
};

/**
 * Function: resetMode
 *
 * Selects the default mode and resets the state of the previously selected
 * mode.
 */
mxToolbar.prototype.resetMode = function(forced)
{
    if ((forced || !this.noReset) && this.selectedMode != this.defaultMode)
    {
        // The last selected switch mode will be activated
        // so the function was already executed and is
        // no longer required here
        this.selectMode(this.defaultMode, this.defaultFunction);
    }
};

/**
 * Function: addSeparator
 *
 * Adds the specifies image as a separator.
 *
 * Parameters:
 *
 * icon - URL of the separator icon.
 */
mxToolbar.prototype.addSeparator = function(icon)
{
    return this.addItem(null, icon, null);
};

/**
 * Function: addBreak
 *
 * Adds a break to the container.
 */
mxToolbar.prototype.addBreak = function()
{
    mxUtils.br(this.container);
};

/**
 * Function: addLine
 *
 * Adds a horizontal line to the container.
 */
mxToolbar.prototype.addLine = function()
{
    var hr = document.createElement('hr');

    hr.style.marginRight = '6px';
    hr.setAttribute('size', '1');

    this.container.appendChild(hr);
};

/**
 * Function: destroy
 *
 * Removes the toolbar and all its associated resources.
 */
mxToolbar.prototype.destroy = function ()
{
    mxEvent.release(this.container);
    this.container = null;
    this.defaultMode = null;
    this.defaultFunction = null;
    this.selectedMode = null;

    if (this.menu != null)
    {
        this.menu.destroy();
    }
};
